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+# Dual Inputs
+The firmware supports the input to be provided from two different sources connected to the Left and Right cable, respectively. To enable dual-inputs functionality uncomment `#define DUAL_INPUTS` in config.h for the respective variant. Various dual-inputs combinations can be realized as illustrated in the following table:
+| Left | Right | Availability |
+| --- | --- | --- |
+| ADC(0) | UART(1) | VARIANT_ADC |
+| ADC(0) | {PPM,PWM,iBUS}(1) | VARIANT_{PPM,PWM,IBUS} |
+| ADC(0) | Sideboard(1*) | VARIANT_HOVERCAR |
+| UART(0) | Sideboard(1*) | VARIANT_UART |
+| UART(1) | Nunchuk(0) | VARIANT_NUNCHUK |
+
+(0) Primary input: this input is used when the Auxilliary input is not available or not connected.
+(1) Auxilliary input: this inputs is used when connected or enabled by a switch(*). If the Auxilliary input is disconnected, the firmware will automatically switch to the Primary input. Timeout is reported **only** on the Primary input.
+
+With slight modifications in config.h, other dual-inputs combinations can be realized as:
+| Left | Right | Possibility |
+| --- | --- | --- |
+| Sideboard(1*) | UART(0) | VARIANT_UART |
+| UART(0) | {PPM,PWM,iBUS}(1) | VARIANT_{PPM,PWM,IBUS} |
+| {PPM,PWM,iBUS}(1) | Nunchuk(0) | VARIANT_{PPM,PWM,IBUS} |